MARMC Technical and Professional Services NOTE: The Government is seeking responses from small business sources who currently hold a Seaport-NxG Multiple Award Contract (MAC). Respondents should indic... MARMC Technical and Professional Services NOTE: The Government is seeking responses from small business sources who currently hold a Seaport-NxG Multiple Award Contract (MAC). Respondents should indicate their current Seaport-NxG contract number as part of their submission